Co/Pd and Co/Pt multilayers have been fabricated on ultra-thin (2 nm) indium tin oxide (ITO) seed layers with soft underlayer for perpendicular magnetic recording. The coercivity of the Co/Pd multilayers was increased from 5.1 kOe to 6.3 kOe by increasing the thickness of the initial Pd layer from 1 nm to 2 nm. Hysteresis loops with an almost perfect remanent squareness, high nucleation field, and more sheared sides were obtained. TEM analysis shows that the films have well-segregated columnar structures which help to reduce exchange coupling and increase coercivity. Spin-stand testing shows that the Co/Pd multilayers have a D50 about 157 kfci without differentiating the output signals. Co/Pt multilayers with ITO seed layers deposited in 40 mTorr of Kr give a coercivity of 6.9 kOe and a D50 about 290 kfci when the output signal is differentiated.
|Original language||English (US)|
|Number of pages||3|
|Journal||IEEE Transactions on Magnetics|
|Issue number||4 I|
|State||Published - Jul 2001|
|Event||8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States|
Duration: Jan 7 2001 → Jan 11 2001
Bibliographical noteFunding Information:
Manuscript received October 13, 2000; revised January 15, 2001. This work was supported by the National Storage Industrial Consortium EHDR Program (partly supported by NSF, Award EEC-9732369), and the Seagate Technology. The authors are with the Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455 USA. Publisher Item Identifier S 0018-9464(01)06861-3.
- Co/Pd multilayers
- Co/Pt muitilayers
- Indium tin oxide seed layers
- Perpendicular magnetic recording